40113221 has 2 divisors, whose sum is σ = 40113222. Its totient is φ = 40113220.

The previous prime is 40113197. The next prime is 40113253. The reversal of 40113221 is 12231104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 1188100 = 6239^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 40113221 - 2²² = 35918917 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40113196 and 40113205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10113221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20056610 + 20056611.

It is an arithmetic number, because the mean of its divisors is an integer number (20056611).

Almost surely, 2^40113221 is an apocalyptic number.

It is an amenable number.

40113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40113221 is an equidigital number, since it uses as much as digits as its factorization.

40113221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40113221 is about 6333.4999013184. The cubic root of 40113221 is about 342.3175606774.

Adding to 40113221 its reverse (12231104), we get a palindrome (52344325).

The spelling of 40113221 in words is "forty million, one hundred thirteen thousand, two hundred twenty-one".